Bride of Elysion

Ina Yoo, an average girl from earth gets summoned to a fantasy world called Elysion where only males with magical powers exist. Elysion summons females from other worlds and the men of Elysion treat the women to be selected as their husbands and mating partners. When the men of Elysion mate with the women, mana from the men are passed on to the women and depending on the mana capacity of the person, the women can use this mana as their own power.